航空声学风洞3/4开口试验平台地板对远场噪声测量的影响

doi:10.7527/S1000-6893.2016.0184

Abstract

Abstract:

Based on the Kirchhoff-Helmholtz diffraction theory, a transient theoretical model for the reflection of spherical sound wave from a 3/4 open jet floor is built, and the amplitude shading and time delay function for the reflection sound pressure on the floor is derived. A numerical method is introduced to solve the reflection sound field. The correctness of the presented method is verified by an experiment. In this study, sin-burst pulse and continuous sinusoidal wave are used to study the propagation of the sound wave and the influence of the 3/4 open jet floor on the far field noise measurements, respectively, and the following results are obtained:the received sound signal contains the directed wave and reflection wave, and the reflection wave is further divided into the center wave and edge wave. In the low frequency range, when the floor width increases, the far field sound pressure level increases accordingly, while in the high frequency range, increasing the floor width has non-obvious effect on the far field noise level. For a high speed train (HST) model, the bogie noise source is easier to be influenced by the floor than the pantograph noise source.

Key words: acoustic wind tunnel, 3/4 open jet floor, noise measurement, sound fields, Kirchhoff-Helmholtz method

CLC Number:

V211.7

ZHANG Jun, CHEN Peng, LEI Hongsheng, ZHANG Junlong, LI Zhengchu. Influence of a 3/4 open jet floor on far field noise measurements in aeroacoustic wind tunnel[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2016, 37(8): 2574-2582.

References

[1] 刘加利. 高速列车气动噪声特性分析与降噪研究[D]. 成都:西南交通大学, 2013:27-35. LIU J L. Study on characteristics analysis and control of aeroacoustics of high-speed trains[D]. Chengdu:Southwest Jiaotong University, 2013:27-35(in Chinese).
[2] 高阳, 王毅刚, 杨志刚, 等. 声学风洞中的高速列车模型气动噪声试验研究[J]. 声学技术, 2013, 32(6):506-510. GAO Y, WANG Y G, YANG Z G, et al. Testing study of aerodynamic noise for high speed train model in aero-acoustic wind tunnel[J]. Technical Acoustics, 2013, 32(6):506-510(in Chinese).
[3] 杨志刚, 李保林, 王毅刚. 支撑地板对高速列车模型风洞气动噪声试验影响[J]. 声学技术, 2013, 32(6):500-505. YANG Z G, LI B L, WANG Y G. Influence of supporting plate on aero-acoustic wind tunnel test for high speed train[J]. Technical Acoustics, 2013, 32(6):500-505(in Chinese).
[4] ZHANG J, ZENG X W. Transient axial solution for the reflection of a spherical acoustic pulse from a concave rigid parabolic reflector[J]. Acta Acustica United with Acustica, 2013, 99(6):867-875.
[5] 张军, 曾新吾. 沿抛物面轴线球面波反射声场的时域解析解[J]. 声学技术, 2013, 32(S1):53-54. ZHANG J, ZENG X W. Transient axial solution for the reflection of a spherical wave from a parabolic reflector[J]. Technical Acoustics, 2013, 32(S1):53-54(in Chinese).
[6] 冯峰, 王强. 基于Kirchhoff方法的亚声速平面混合层主涡对并声场分析[J]. 航空学报, 2013, 34(3):467-473. FENG F, WANG Q. Analysis of acoustic field of primary vortex pairing in subsonic plane mixing layers using Kirchhoff method[J]. Acta Aeronautica et Astronautica Sinica, 2013, 34(3):467-473(in Chinese).
[7] 侯宏, 王冲, 杨建华, 等. 多声源的自由场有源声吸收[J]. 声学学报, 1994, 19(3):188-195. HOU H, WANG C, YANG J H, et al. Active noise absorption by multisources in free field[J]. Acta Acoustica Sinica, 1994, 19(3):188-195(in Chinese).
[8] LASOTA H, SALAMON R, DELANNOY B. Acoustic diffraction analysis by the impulse response method:A line impulse response approach[J]. Journal of the Acoustical Society of America, 1984, 76(1):280-290.
[9] SKUDRZYK S. The foundations of acoustics[M]. New York:Springer-Verlag, 1971:Chap.3.
[10] DELANNOY B, LASOTA H, BRUNNEL C. The infinite planar baffles problem in acoustic radiation and its experimental verification[J]. Journal of Applied Physics, 1979, 50(8):5189-5195.
[11] PIWAKOWSKI B, DELANNOY B. Method for computing spatial pulse response:Time-domain approach[J]. Journal of the Acoustical Society of America, 1989, 86(6):2422-2432.
[12] PIWAKOWSKI B, SBAI K. A new approach to calculate the field radiate from arbitrarily structured transducer arrays[J]. IEEE Transactions on Ultrasonics Ferroelectrics & Frequency Control, 1999, 46(2):422-440
[13] FRANCO E E, ANDRADE M A B, ADAMOWSKI J C, et al. Acoustic beam modeling of ultrasonic transducers and arrays using the impulse response and the discrete representation methods[J]. Journal of the Brazilian Society of Mechanical Sciences & Engineering, 2011, 33(4):408-416.
[14] LUCAS B G, MUIR T G. The field of a focusing source[J]. Journal of the Acoustical Society of America, 1982, 73(4):1289-1296.
[15] 张军, 郭涛, 孙帮成, 等. 高速列车气动噪声源特性研究[J]. 铁道学报, 2015, 37(6):10-18. ZHANG J, GUO T, SUN B C, et al. Research on characteristics of aerodynamic noise source for high-speed train[J]. Journal of the China Railway Society, 2015, 37(6):10-18(in Chinese).
[16] 孙振旭, 宋婧婧, 安亦然. CRH3型高速列车气动噪声数值模拟研究[J]. 北京大学学报, 2012, 48(5):701-711. SUN Z X, SONG J J, AN Y R. Numerical simulation of aerodynamic noise generated by CRH3 high speed trains[J]. Acta Scientiarum Naturalium Universitatis Pekinensis, 2012, 48(5):701-711(in Chinese).

Influence of a 3/4 open jet floor on far field noise measurements in aeroacoustic wind tunnel

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 7

Recommended Articles

Metrics

Comments

[1]	ZHAO Kun, LIANG Junbiao, Ivan BELYAEV, Victor KOPIEV, Gareth BENNETT. Review of civil airplane landing gear noise study and its control approaches [J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2022, 43(8): 26996-026996.
[2]	ZHANG Junlong, LEI Hongsheng, TIAN Hao, LI Jie. Noise radiation characteristics and source distribution of subsonic rectangular jet [J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2020, 41(2): 123386-123386.
[3]	LIANG Yong, CHEN Yingchun, ZHAO Kun, SUN Jing, LU Xiangyu, ZHAO Yu. Test on suppression of aircraft landing gear/bay coupling noise using sawtooth spoiler [J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2019, 40(8): 122932-122932.
[4]	WEI Long, QIN Zhaohong, REN Fang, ZHANG Zhong, LI Min, LIU Xue. An improved acoustic deconvolution method for localizing correlated sound sources [J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2019, 40(11): 123100-123100.
[5]	XING Yu, LIU Peiqing, GUO Hao, XU Liang, LI Ling. Similarity rule and Mach number scaling law for simplified landing gear noise [J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2017, 38(6): 120769-120769.
[6]	WANG Xiaoyuan, GUO Hao, XING Yu, LIU Peiqing. Mechanism test on aero acoustic characteristics of LAGOON landing gear wheel cavities [J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2017, 38(5): 120549-120549.
[7]	Qiao Weiyang;Ulf Michel. Experimental Study of Airframe Noise with Improved Data Reduction Method of Microphone Array Measurements [J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2008, 29(3): 527-533.